Flush apparatus and flush control method thereof

ABSTRACT

The present invention provides a flush apparatus and a flush control method thereof. The flush control method includes the steps of detecting a target, counting an interval time from a previous flush to the detection of the target, and comparing the interval time with at least one pre-set interval time to determine an operating mode of the flush apparatus.

CROSS REFERENCE TO RELATED APPLICATIONS

This non-provisional application claims priority under 35 U.S.C. §119(a)on Patent Application No(s). 200810129824.3 filed in the People'sRepublic of China on Aug. 7, 2008, the entire contents of which arehereby incorporated by reference.

BACKGROUND OF THE INVENTION

1. Field of Invention

The present invention relates to a flush apparatus and a flush controlmethod thereof and, in particular, to a flush apparatus and its flushcontrol method having energy-saving and water-saving functions.

2. Related Art

Under the emerging environment protection trend, various energy-savingtechniques are also developed rapidly to save various kinds ofresources. In some occasions, improvements still have to be made tosatisfy the energy-saving requirement. For example, a conventional flushmethod of a public urinal is to change the flush time according to thefrequency of use. The flush time gets shorter as the frequency of usegets higher, and the flush time gets longer as the frequency of use getslower. However, such a flush method is simple and cannot be adapted tothe new energy-saving age.

SUMMARY OF THE INVENTION

In view of the foregoing, the present invention is to provide adiversified flush control method to satisfy the present requirement andachieve the water-saving effect. The present invention further providesa flush apparatus having the energy-saving and water-saving functionsand its flush control method.

To achieve the above, the present invention discloses a flush apparatusincluding a valve, an actuator unit, a power supply unit, a booster unitand a control unit. The actuator unit is connected to the valve. Thebooster unit is electrically connected to the actuator unit and thepower supply unit. The control unit detects the power supply unit andoutputs a control signal to the booster unit according to the detectionto enable the actuator unit.

The flush apparatus is preferably an automatic flush urinal.

The flush apparatus further includes a detecting unit for transmitting adetection signal to the control unit. The detecting unit is preferablyan infrared detecting unit. The detecting unit includes a transmittingelement and a receiving element. When a target starts to use the flushapparatus, the transmitting element transmits an infrared signal,thereby detecting whether the receiving element receives the infraredsignal so as to determine whether the target exists or not. The controlunit performs a time counting operation according to the detectionsignal.

The actuator unit includes an electromagnetic element or a solenoid.

The power supply unit includes a rectifier or a battery such as a solarcell or a rechargeable battery.

The control signal is a duty cycle control signal, a frequency controlsignal or a voltage control signal.

The booster unit includes a converter and at least one switch elementelectrically connected to the converter. The converter is preferably aDC/DC converter, and the switch element is preferably a transistor.

The control unit includes a micro-controller unit (MCU) and a detectingelement electrically connected to the MCU. The detecting element iselectrically connected to the power supply unit to detect electric powerof the power supply unit and to transmit an electric power signal to theMCU. The MCU transmits the control signal according to the electricpower signal.

The flush apparatus further includes an energy storage unit and a switchunit. The energy storage unit is electrically connected to the actuatorunit, and the switch unit is electrically connected to the booster unitand the energy storage unit. The energy storage unit includes acapacitor, and the switch unit includes at least one transistor.

The actuator unit includes a first state and a second state, and ischanged into the first state or the second state by the control unit.

The flush apparatus further includes a switch unit electricallyconnected between the control unit and the actuator unit. The switchunit is activated or deactivated corresponding to the first state or thesecond state of the actuator unit. The valve is opened when the actuatorunit is in the first state and is enabled, and the valve is closed whenthe actuator unit is in the second state and is enabled.

To achieve the above, the present invention also discloses a flushcontrol method applied to a flush apparatus. The flush control methodincludes the steps of: detecting a target, counting an interval timefrom a previous flush to the detection of the target, and comparing theinterval time with at least one pre-set interval time to determine anoperating mode of the flush apparatus. The interval time is countedaccording to a detection signal transmitted by the flush apparatus.

The operating mode includes the steps of: counting the number of timesof detection of the target, and comparing the number of times with atleast one pre-set number of times to determine a flush time of the flushapparatus.

Alternatively, the operating mode can includes the steps of: counting ause time of the target, and comparing the use time with at least onepre-set use time to determine a flush time of the flush apparatus.

Or else, the operating mode can includes the step of comparing a flushtime of the flush with at least one pre-set flush time to determine aflush time of the flush apparatus.

In addition, the present invention further discloses a flush controlmethod applied to a flush apparatus, which includes the steps of:detecting a target, obtaining a comparison parameter according to aflush of the flush apparatus or the target, and determining an operatingmode of the flush apparatus according to the comparison parameter.

In addition, the present invention further discloses a flush controlmethod applied to a flush apparatus, which includes the steps of:detecting a target, counting the number of times of detection of thetarget, and comparing the number of times with at least one pre-setnumber of times to determine a flush time of the flush apparatus. Thenumber of times of detection of the target is counted according to adetection signal transmitted by the flush apparatus.

In addition, the present invention further discloses a flush controlmethod applied to a flush apparatus, which includes the steps of:detecting a target, counting a use time of the target, and comparing theuse time with at least one pre-set use time to determine a flush time ofthe flush apparatus. The use time of the target is counted according toa detection signal transmitted by the flush apparatus.

In addition, the present invention further discloses a flush controlmethod applied to a flush apparatus, which includes the steps of:detecting a target, and comparing a flush time of the flush apparatuswith at least one pre-set flush time to determine next flush time of theflush apparatus.

As mentioned above, the automatic flush apparatus and its flush controlmethod of the present invention can determine the operating mode of theflush apparatus according to the comparison between the interval timeand the pre-set interval time. The operating modes have differentcomparison parameters correspondingly. For example, the numbers of timesof detection of the targets are adapted to be a comparison base in thefirst operating mode, the use times of the targets are adapted to be acomparison base in the second operating mode, and the flush times areadapted to be a comparison base in the third operating mode to determinethe required flush time. In addition, the modes of the present inventionmay also be independently or combinatively used without comparing theinterval time with the pre-set interval time. Thus, the flush controlmethod of the invention has diversified comparison parameters so thatthe variety can be increased, the requirement of energy-saving can besatisfied and the water-saving effect can be achieved.

In addition, the automatic flush apparatus of the present inventioncontrols the operation of the booster unit according to the controlsignal so that the operation time of the booster unit can be shortened,the power consumption of the power supply unit can be decreased, and theenergy-saving effect can be thus achieved. In addition, when theelectric power supplied by the power supply unit is decreased, thecontrol signal may also control the booster unit for transformingsufficient electric power to enable the actuator unit so that theelectric power availability can be enhanced.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from thesubsequent detailed description and accompanying drawings, which aregiven by way of illustration only, and thus are not limitative of thepresent invention, and wherein:

FIG. 1 is a schematic block diagram showing an automatic flush apparatusaccording to a preferred embodiment of the present invention;

FIG. 2 is a schematic block diagram showing another automatic flushapparatus according to the preferred embodiment of the presentinvention;

FIG. 3 is a flow chart showing a flush control method applied to theautomatic flush apparatus of the present invention;

FIG. 4A shows a first operating mode of the flush control methodaccording to the preferred embodiment of the present invention;

FIG. 4B shows a second operating mode of the flush control methodaccording to the preferred embodiment of the present invention; and

FIG. 4C shows a third operating mode of the flush control methodaccording to the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

The present invention will be apparent from the following detaileddescription, which proceeds with reference to the accompanying drawings,wherein the same references relate to the same elements.

Referring to FIG. 1, an automatic flush apparatus 1 includes a valve 11,an actuator unit 12, a power supply unit 13, a booster unit 14, acontrol unit 15 and a detecting unit 16. The automatic flush apparatus 1can be an automatic flush urinal. The control unit 15 detects the powersupply unit 13 and outputs a control signal S_(C) to the booster unit 14according to the detection to enable the actuator unit 12. The detectingunit 16 transmits a detection signal S_(D) to the control unit 15.

The valve 11 functions as a switch for flushing. When the valve 11 isopened, the flush apparatus 1 can flush. When the valve 11 is closed,the flush apparatus 1 cannot flush. The actuator unit 12 connected tothe valve 11 actuates the valve 11. The actuator unit 12 can include anelectromagnetic element, such as a solenoid. The power supply unit 13supplies the electric power, and includes a battery, such as a solarcell. Alternatively, the power supply unit 13 includes a rectifier,which can convert the AC power into the DC power. Of course, the powersupply unit 13 can also include a rechargeable battery.

The booster unit 14 is electrically connected to the actuator unit 12and the power supply unit 13, and can boost the electric power outputtedfrom the power supply unit 13 and enable the actuator unit 12 to actuatethe valve 11. The control unit 15 detects the power supply unit 13 andoutputs the control signal S_(C) to the booster unit 14 according to thedetection to enable the actuator unit 12. The control unit 15 can detectthe electric power of the power supply unit 13.

Consequently, when the electric power supplied by the power supply unit13 is decreased, the control unit 15 can adjust the outputted controlsignal S_(C) to the booster unit 14 according to its detection, therebyenabling the booster unit 14 to boost according to the control signalS_(C) so as to generate sufficient electric power to enable the actuatorunit 12. The control signal S_(C) can be a duty cycle control signal, afrequency control signal or a voltage control signal. Through adjustingthe duty cycle, frequency or voltage of the control signal S_(C), thebooster unit 14 can be enabled in response to different electric powerand generate sufficient electric power to enable the actuator unit 12.

In addition, the booster unit 14 can be controlled to operate accordingto the control signal S_(C). The power supply unit 13 cannot consume theelectric power until the booster unit 14 operates. So, the operatingtime of the booster unit 14 can be shortened according to the controlsignal S_(C), and the electric power consumption of the power supplyunit 13 can be avoided.

FIG. 2 shows an automatic flush apparatus 1 according to anotherembodiment of the invention. In this embodiment, the control unit 15 mayinclude a micro-controller unit (MCU) 151 and a detecting element 152electrically connected to the MCU 151. The detecting element 152 iselectrically connected to the power supply unit 13 and can detect theelectric power of the power supply unit 13 and transmit an electricpower signal S_(P) to the MCU 151, which transmits the control signalS_(C) according to the electric power signal S_(P). For example, whenthe drop of the electric power is detected, the MCU 151 may increase theduty cycle, frequency or voltage of the control signal S_(C) so that thebooster unit 14 is enabled according to the control signal S_(C).

In addition, the booster unit 14 can include a converter 141 and atleast one switch element 142 electrically connected to the converter141. The converter 141 can be a DC/DC converter, and the switch element142 can be a transistor. The control unit 15 transmits the controlsignal S_(C) and enables the switch element 142 to switch. The converter141 can boost according to the switching, and can obtain differentboosting effects by adjusting the control signal S_(C) in response todifferent electric power supplied by the power supply unit 13.

In addition, the flush apparatus 1 further includes an energy storageunit C and a switch unit S1. The energy storage unit C is electricallyconnected to the actuator unit 12, and the switch unit S1 iselectrically connected to the booster unit 14 and the energy storageunit C. The energy storage unit C includes a capacitor. Thus, the switchunit S1 can include at least one transistor. When the control unit 15transmits the control signal S_(C) to the booster unit 14, the switchunit S1 can turn on so that the energy storage unit C is charged by thebooster unit 14. When the control unit 15 stops enabling the boosterunit 14, the switch unit S1 turns off so that the energy storage unit Cis discharged and thus enable the actuator unit 12. In this embodiment,the control unit 15 enables the booster unit 14 for severalmilliseconds, for example. In addition, the energy storage unit C hasthe voltage regulating effect.

In addition, the actuator unit 12 includes a first state and a secondstate, and is changed into the first state or the second state by thecontrol unit 15. For example, the actuator unit 12 is in the first statewhen the control unit 15 transmits a turn-on signal S_(ON) to theactuator unit 12 to turn on the actuator unit 12, and the actuator unit12 is in the second state when the control unit 15 transmits a turn-offsignal S_(OFF) or no signal to the actuator unit 12 to turn off theactuator unit 12. The flush apparatus 1 further includes a switch unitS2 electrically connected between the control unit 15 and the actuatorunit 12. The switch unit S2 is activated or deactivated corresponding tothe first state or the second state of the actuator unit.

The valve 11 is opened when the actuator unit 12 is in the first stateand enabled, and the valve 11 is closed when the actuator unit 12 is inthe second state and enabled. The flush control method of the flushapparatus 1 will be described in the following. When the flush apparatus1 starts to flush, the control unit 15 turns on the actuator unit 12 andtransmits the control signal S_(C) to the booster unit 14, and thebooster unit 14 boosts and enables the actuator unit 12. Because theactuator unit 12 is in the first state and enabled, the valve 11 isopened to perform the flush operation. Thereafter, the control unit 15stops enabling the booster unit 14 and thus prevents from consumption ofthe electric power. Meanwhile, the flush operation is still performed.

When the flush apparatus 1 stops flushing, the control unit 15 turns offthe actuator unit 12 and transmits the control signal S_(C) to thebooster unit 14 so that the booster unit 14 boosts and enables theactuator unit 12. Because the actuator unit 12 is in the second stateand enabled, the valve 11 is closed and stops supplying the water. Asmentioned hereinabove, the booster unit 14 is only enabled when theflush operation starts or stops. So, the electric power consumption canbe greatly reduced.

The detecting unit 16 is electrically connected to the control unit 15and transmits the detection signal S_(D) to the control unit 15. Thedetecting unit 16 can be an infrared detecting unit. In this embodiment,the detecting unit 16 includes a transmitting element 161 and areceiving element 162. Taking a urinal for example, when a target, suchas a user, starts to use the urinal, the transmitting element 161transmits an infrared signal, which is reflected by the target and thenreceived by the receiving element 162, so that the urinal can detect theexistence of the target. Then, when the target leaves, the receivingelement 162 cannot receive the infrared signal, so that the urinal candetect that the target has left. The detection signal S_(D) reflects thetwo conditions and thus make the control unit 15 correspondinglyoperate. For example, the flush operation is performed when the detectedtarget leaves or when the target is using the urinal.

The control unit 15 can perform a time counting operation according tothe detection signal S_(D), and determines the timing of enabling thebooster unit 14 by the control signal S_(C) according to the timecounting operation so that the time of flush can be controlled. Forexample, the time counting operation is applied to the use time of thetarget. The flush time may be shortened as the use time of the targetgets shorter. As mentioned hereinabove, the booster unit 14 is onlyenabled when the flush starts or stops. So, the flush time can bedetermined according to the timing of enabling the booster unit 14 bythe control signal S_(C) so that the water-saving effect can beachieved.

FIG. 3 is a flow chart showing a flush control method applied to theautomatic flush apparatus of the present invention. Referring to FIG. 3,the method includes steps S01 to S04. In step S01, an automatic flushapparatus is provided. In step S02, a target is detected. The steps S02and S03 can be repeatedly performed by the flush apparatus, and theorder of the steps S02 and S03 is not particularly limited. For example,when the target starts to use the urinal, a detecting unit detects theexistence of the target. When the target leaves, the detecting unitdetects that the target has left so that the flush operation can beperformed. Then, if another target wants to use the urinal, thedetecting unit performs the detection again.

In step S03, an interval time from the previous flush to the detectionof the target is counted. In this step, the flush apparatus can countthe interval time, wherein the start point of the interval time can bechosen as the beginning of the flush, the middle of the flush or theending of the flush, for example, and the end point can be chosen as thetime instant after the flush and before the existence of the nexttarget. The frequency of usage gets lower as the interval time getslonger, and the frequency of usage higher as the interval time getsshorter. In addition, the interval time of this embodiment can have oneor more samples. When the interval time has one sample, the intervaltime from one flush to the detection of the next target can be counted.When the interval time has many samples, the above-mentioned countingoperation can be repeated to get many interval times.

In step S04, the interval time is compared with at least one pre-setinterval time to determine the operating mode of the flush apparatus.The pre-set interval time can be determined by the manufacturer or beset by the target. The flush control method of this embodiment has aplurality of operating modes. The operating mode of the flush apparatusis selected according to comparison between the interval time and thepre-set interval time. It is to be noted that if the interval time ofthis embodiment has many samples, the average of the samples can beobtained. The modes of this embodiment are designed according todifferent comparison parameters so that the variety can be increased,the requirement of energy-saving can be satisfied, and the water-savingeffect can be achieved.

The flush control method of the present invention will be described inthe following. As shown in FIG. 4A, the interval time is compared with afirst pre-set interval time (e.g., 30 seconds). When the interval timeis shorter than the first pre-set interval time, a first operating modeis chosen. The interval time of this embodiment can be counted accordingto the detection signal S_(D), such as the detection signal S_(D)corresponding to the detection of the leave of the first target, and thedetection signal S_(D) corresponding to the detection of the existenceof the second target.

The first operating mode includes the steps of counting the number oftimes of detection of the target, and comparing the number of times withat least one pre-set number of times to determine the flush time of theflush apparatus 1. When many targets continuously use the flushapparatus 1, the detecting unit 16 of the flush apparatus 1 can detectmany targets, and the flush apparatus can count the number of times ofdetection of the targets and perform the comparison. When the number oftimes is smaller than the pre-set number of times, such as 6, as theformer five targets use the flush apparatus, the flush time of the flushapparatus is 2.5 seconds. When the number of times is equal to thepre-set number of times as the sixth target uses the flush apparatus,the flush time of the flush apparatus is 3.5 seconds. When the number oftimes is greater than the pre-set number of times as the seventh targetuses the flush apparatus, the flush time of the flush apparatus is 3seconds.

It is to be noted that the control unit 15 of this embodiment onlyenables the booster unit 14 when the flush starts or stops so that theflush operation can be continuously performed. Thus, the flush time canbe determined according to the time instants when the control unit 15enables the booster unit 14.

The comparison parameter considered in the first operating mode is thenumber of times of detection of the targets, and the flush time can bedetermined accordingly so that the variety of the flush control methodcan be increased. In addition, the steps included in the first operatingmode can be independently used without the comparison of the intervaltime with the first pre-set interval time.

As shown in FIG. 4B, the method of this embodiment further includes thestep of comparing the interval time with a second pre-set interval time(e.g., 30 minutes). When the interval time is shorter than the secondpre-set interval time, a second operating mode is chosen. In thisembodiment, the step of comparing the interval time with the secondpre-set interval time cannot be performed until that the interval timeis not shorter than the first pre-set interval time.

The second operating mode includes the steps of counting the use time ofthe target, and comparing the use time with at least one pre-set usetime to determine the flush time of the flush apparatus. Each target hasits use time, and the use time can be counted according to the detectionsignal S_(D). For example, the use time can be counted according to thedetection signal S_(D) corresponding to the detection of the existenceof the target, and the detection signal S_(D) corresponding to thedetection of the leave of the target. For example, the use time startsfrom the detection of the existence of the target by the detecting unit16 to the detection of the leave of the target by the detecting unit 16.The flush apparatus 1 can count the use time of each target and performthe comparison. When the use time is shorter than the first pre-set usetime (e.g., 20 seconds), the determined flush time is 3 seconds. Whenthe use time is shorter than the second pre-set use time (e.g., 45seconds) and longer than or equal to the first pre-set use time, theflush time of the flush apparatus is 3.5 seconds. When the use time islonger than or equal to the second pre-set use time, the flush time ofthe flush apparatus is 4 seconds.

The comparison parameter considered in the second operating mode is theuse times of the targets, and the flush time can be determinedaccordingly so that the variety of the flush control method can beincreased. In addition, the steps included in the second operating modecan be independently used without the comparison of the interval timewith the second pre-set interval time. In addition, the second operatingmode can also be used in conjunction with the first operating mode.

As shown in FIG. 4C, when the interval time is not shorter than thesecond pre-set interval time, a third operating mode is chosen. Thethird operating mode includes the step of comparing the flush time ofthe flush with the at least one pre-set flush time to determine theflush time of the flush apparatus. Each flush has its flush time, andthe flush apparatus 1 can record or get each flush time and perform thecomparison to determine the next flush time. Herein, the previous flushtime is compared with the pre-set flush time.

In addition, the third operating mode of this embodiment can be used inconjunction with the second operating mode. First, as shown in thesecond operating mode, the use time is compared with the first pre-setuse time. When the use time is shorter than the first pre-set use time,the flush time of the previous flush is compared with a pre-set flushtime (e.g., 5 seconds). When the flush time is unequal to the pre-setflush time, the next flush time determined is 5 seconds. When the flushtime is equal to the pre-set flush time, the next flush time determinedis 3 seconds.

When the use time is shorter than the second pre-set use time (45seconds) and longer than or equal to the first pre-set use time (20seconds), the flush time of the previous flush is compared with thepre-set flush time. When the flush time is unequal to the pre-set flushtime, the next flush time determined is 5 seconds. When the flush timeis equal to the pre-set flush time, the next flush time determined is3.5 seconds.

When the use time is longer than or equal to the second pre-set usetime, the flush time of the previous flush is compared with the pre-setflush time. When the flush time is unequal to the pre-set flush time,the next flush time determined is 5 seconds. When the flush time isequal to the pre-set flush time, the next flush time determined is 4seconds.

The comparison parameter considered in the third operating mode is theflush time, and the flush time is determined accordingly so that thevariety of the flush control method can be increased. The step includedin the third operating mode can be independently used without thecomparison of the interval time with the second pre-set interval time.In addition, at least two of the third operating mode, the firstoperating mode and the second operating mode can be applied together sothat the variety of the flush control method can be enhanced.

In summary, the automatic flush apparatus and its flush control methodof the present invention can determine the operating mode of the flushapparatus according to the comparison between the interval time and thepre-set interval time. The operating modes have different comparisonparameters correspondingly. For example, the numbers of times ofdetection of the targets are adapted to be a comparison base in thefirst operating mode, the use times of the targets are adapted to be acomparison base in the second operating mode, and the flush times areadapted to be a comparison base in the third operating mode to determinethe required flush time. In addition, the modes of the present inventionmay also be independently or combinatively used without comparing theinterval time with the pre-set interval time. Thus, the flush controlmethod of the invention has diversified comparison parameters so thatthe variety can be increased, the requirement of energy-saving can besatisfied and the water-saving effect can be achieved.

In addition, the automatic flush apparatus of the present inventioncontrols the operation of the booster unit according to the controlsignal so that the operation time of the booster unit can be shortened,the power consumption of the power supply unit can be decreased, and theenergy-saving effect can be thus achieved. In addition, when theelectric power supplied by the power supply unit is decreased, thecontrol signal may also control the booster unit for transformingsufficient electric power to enable the actuator unit so that theelectric power availability can be enhanced.

Although the present invention has been described with reference tospecific embodiments, this description is not meant to be construed in alimiting sense. Various modifications of the disclosed embodiments, aswell as alternative embodiments, will be apparent to persons skilled inthe art. It is, therefore, contemplated that the appended claims willcover all modifications that fall within the true scope of the presentinvention.

1. A flush apparatus, comprising: a valve; an actuator unit connected tothe valve; a power supply unit; a booster unit electrically connected tothe actuator unit and the power supply unit; and a control unit fordetecting the power supply unit and outputting a control signal to thebooster unit according to the detection to enable the actuator unit. 2.The flush apparatus according to claim 1, further comprising: adetecting unit for transmitting a detection signal to the control unit.3. The flush apparatus according to claim 2, wherein the detecting unitis an infrared detecting unit, and the flush apparatus is an automaticflush urinal.
 4. The flush apparatus according to claim 2, wherein thedetecting unit comprises a transmitting element and a receiving element,and when a target starts to use the flush apparatus, the transmittingelement transmits an infrared signal, thereby detecting whether thereceiving element receives the infrared signal so as to determinewhether the target exists or not.
 5. The flush apparatus according toclaim 2, wherein the control unit performs a time counting operationaccording to the detection signal.
 6. The flush apparatus according toclaim 1, wherein the actuator unit comprises an electromagnetic elementor a solenoid.
 7. The flush apparatus according to claim 1, wherein thepower supply unit comprises a solar cell, a rechargeable battery, abattery or a rectifier.
 8. The flush apparatus according to claim 1,wherein the control signal is a duty cycle control signal, a frequencycontrol signal or a voltage control signal.
 9. The flush apparatusaccording to claim 1, wherein the booster unit comprises a converter andat least one switch element electrically connected to the converter. 10.The flush apparatus according to any one of claim 1, wherein: thecontrol unit comprises a micro-controller unit (MCU) and a detectingelement electrically connected to the MCU; the detecting element iselectrically connected to the power supply unit to detect electric powerof the power supply unit and to transmit an electric power signal to theMCU; and the MCU transmits the control signal according to the electricpower signal.
 11. The flush apparatus according to claim 1, furthercomprising an energy storage unit and a switch unit, wherein the energystorage unit is electrically connected to the actuator unit, and theswitch unit is electrically connected to the booster unit and the energystorage unit.
 12. The flush apparatus according to claim 11, wherein theenergy storage unit comprises a capacitor, and the switch unit comprisesat least one transistor.
 13. The flush apparatus according to claim 1,wherein the actuator unit comprises a first state and a second state,and is changed into the first state or the second state by the controlunit.
 14. The flush apparatus according to claim 13, further comprisinga switch unit electrically connected between the control unit and theactuator unit, wherein the switch unit is activated or deactivatedcorresponding to the first state or the second state of the actuatorunit, so that the valve is opened when the actuator unit is in the firststate and is enabled, and the valve is closed when the actuator unit isin the second state and is enabled.
 15. A flush control method appliedto a flush apparatus, comprising steps of: detecting a target; countingan interval time from a previous flush to the detection of the target;and comparing the interval time with at least one pre-set interval timeto determine an operating mode of the flush apparatus.
 16. The methodaccording to claim 15, wherein the interval time is counted according toa detection signal transmitted by the flush apparatus.
 17. The methodaccording to claim 15, wherein the operating mode comprises: countingthe number of times of detection of the target; and comparing the numberof times with at least one pre-set number of times to determine a flushtime of the flush apparatus.
 18. The method according to claim 15,wherein the operating mode comprises: counting a use time of the target;and comparing the use time with at least one pre-set use time todetermine a flush time of the flush apparatus.
 19. The method accordingto claim 15, wherein the operating mode comprises: comparing a flushtime of the flush apparatus with at least one pre-set flush time todetermine next flush time of the flush apparatus.
 20. A flush controlmethod applied to a flush apparatus, comprising steps of: detecting atarget; and obtaining a comparison parameter according to a flush of theflush apparatus or the target, and determining an operating mode of theflush apparatus according to the comparison parameter.